Washington Navy Yard, DC

ZIP code 20398 is located in Washington, D.C. This area is home to the Pentagon, one of the most prominent landmarks in the United States. The Pentagon is the headquarters of the United States Department of Defense and serves as the nerve center for the U.S. military. In addition to the Pentagon, this ZIP code also houses the Arlington National Cemetery, a revered military cemetery honoring those who have served in the U.S. Armed Forces.